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Denitration catalyst taking attapulgite-cordierite honeycomb ceramic-TiO2 as carrier

A denitration catalyst and attapulgite technology, applied in the field of catalysts, can solve the problems of poor mechanical properties of catalysts, environmental pollution, high treatment costs, etc., and achieve the effects of wide active temperature window, strong operability and high denitrification efficiency

Inactive Publication Date: 2017-02-15
南京禾宇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the mechanical properties of the catalyst are not good, severe peeling and other phenomena will not be regenerated during use. This part of the catalyst must be treated as hazardous waste, which is costly and seriously pollutes the environment.

Method used

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  • Denitration catalyst taking attapulgite-cordierite honeycomb ceramic-TiO2 as carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Raw materials: 105 parts of attapulgite, 70 parts of cordierite honeycomb ceramics, TiO 2 30 copies, MoO 2 15 parts, Cr 2 o 3 15 parts, MnO 2 25 parts, SnO 2 8 parts, ZrO 2 20 parts, 32 parts of polyurea grease and 10 parts of 12-tungstophosphoric acid.

[0015] Preparation method: (1) TiO 2 The precursor titanic acid solution, attapulgite and cordierite honeycomb ceramics, mix the titanic acid solution and electrolyte solution, add attapulgite and cordierite honeycomb ceramics to it for impregnation, after aging for 20 hours, transfer the mixed solution to water In a hot kettle, react at 130°C for 13 hours, filter, wash, dry, and roast to obtain attapulgite-cordierite honeycomb ceramics-TiO 2 carrier;

[0016] (2) Weigh MoO by weight parts 2 、Cr 2 o 3 , MnO 2 , SnO 2 , ZrO 2 , polyurea grease and 12-tungstophosphoric acid, MoO 2 、Cr 2 o 3 , MnO 2 , SnO 2 , ZrO 2 After mixing with 12-tungstophosphoric acid, add the carrier prepared above and imp...

Embodiment 2

[0017] Raw materials: 115 parts of attapulgite, 60 parts of cordierite honeycomb ceramics, TiO 2 28 copies, MoO 2 25 parts, Cr 2 o 3 10 parts, MnO 2 22 parts, SnO 2 10 parts, ZrO 2 15 parts, 25 parts of lubricant and 15 parts of 12-tungstosilicate, wherein the lubricant is epoxy resin and polyacrylate.

[0018] Preparation method: (1) TiO 2 The precursor titanium tetrachloride solution, attapulgite and cordierite honeycomb ceramics, mix titanium tetrachloride solution and electrolyte solution, add attapulgite and cordierite honeycomb ceramics to it for impregnation, after aging for 30h, mix The solution was transferred to a hydrothermal kettle, and then reacted at 140°C for 14 hours. After filtering, washing, drying, and roasting, the attapulgite-cordier honeycomb ceramics-TiO 2 carrier;

[0019] (2) Weigh MoO by weight parts 2 、Cr 2 o 3 , MnO 2 , SnO 2 , ZrO 2 , lubricant and 12-tungstosilicic acid, the MoO 2 、Cr 2 o 3 , MnO 2 , SnO 2 , ZrO 2 After mi...

Embodiment 3

[0020] Raw materials: 100 parts of attapulgite, 80 parts of cordierite honeycomb ceramics, TiO 2 20 copies, MoO 2 30 parts, Cr 2 o 3 5 parts, MnO 2 30 parts, SnO 2 2 parts, ZrO 2 27 parts, 17 parts of lubricant and 15 parts of 12-molybdosilicic acid, wherein the lubricant is fatty acid amide and oleic acid.

[0021] Preparation method: (1) TiO 2 The precursor titanyl sulfate solution, attapulgite and cordierite honeycomb ceramics, mix titanyl sulfate solution and electrolyte solution, add attapulgite and cordierite honeycomb ceramics to impregnate it, after aging for 15h, transfer the mixed solution Put it in a hydrothermal kettle, and then react at 120°C for 12 hours. After filtering, washing, drying, and roasting, attapulgite-cordierite honeycomb ceramics-TiO 2 carrier;

[0022] (2) MoO 2 、Cr 2 o 3 , MnO 2 , SnO 2 , ZrO 2 After mixing with 12-molybdosilicic acid, add the carrier prepared above and impregnate to obtain a denitrification catalyst slurry, mix...

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Abstract

The invention discloses a denitration catalyst taking attapulgite-cordierite honeycomb ceramic-TiO2 as a carrier. The denitration catalyst comprises following raw materials: attapulgite, cordierite honeycomb ceramic, TiO2, MoO2, Cr2O3, MnO2, SnO2, ZrO2, a lubricating agent, and heteropolyacid. A preparation method comprises following steps: a titanium salt solution and an electrolyte solution are mixed so as to obtain a mixture; attapulgite and cordierite honeycomb ceramic are added into the mixture for dipping; aging is carried out; an obtained mixed solution is delivered into a hydrothermal vessel for reaction so as to obtain the carrier; MoO2, Cr2O3, MnO2, SnO2, ZrO2, and heteropolyacid are uniformly mixed so as to obtain a mixed material; the carrier is added into the mixed material for dipping so as to obtain the denitration catalyst. The denitration catalyst possesses following advantages: light-off temperature of the preparation method is relatively low; thermal stability and hydrothermal stability of the denitration catalyst are high; active temperature window is wide; denitration efficiency is high; catalyst service life is long; and in addition, the preparation method is simple, operability is high, and production cost is reduced.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to an attapulgite-cordier honeycomb ceramic-TiO 2 Supported denitration catalyst. Background technique [0002] The pollution of nitrogen oxides to the environment is very serious. Nitrogen oxides are not only the basis of nitric acid rain, but also one of the main substances that form photochemical smog and destroy the ozone layer. Nitrogen oxides are also very toxic and will cause serious damage to human health. Big damage. In recent years, with the rapid development of the economy, the emission of nitrogen oxide pollutants has increased rapidly, seriously polluting the ecological environment, and has become an environmental issue of global concern. [0003] By installing denitrification devices in thermal power plants and industrial furnaces, the emission of nitrogen oxides can be controlled. Selective catalytic reduction (SCR) denitrification is the most widely used and most mature fl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J27/19B01D53/86B01D53/56B01D53/90
CPCB01J23/002B01D53/8628B01D53/90B01D2258/0283B01J23/34B01J27/19B01J2523/00B01J2523/41B01J2523/43B01J2523/47B01J2523/48B01J2523/68B01J2523/69B01J2523/72
Inventor 史和生
Owner 南京禾宇化工有限公司